公开(公告)号：US20130327491A1

公开(公告)日：2013-12-12

申请号：US13966735

申请日：2013-08-14

申请人： Masashi HARA ,  Kazuhiko ITOH ,  Mikio KONDOH ,  Kazuaki NISHINO ,  Isamu UEDA ,  Kimihiko ANDO ,  Yoshihiko ITO

发明人： Masashi HARA ,  Kazuhiko ITOH ,  Mikio KONDOH ,  Kazuaki NISHINO ,  Isamu UEDA ,  Kimihiko ANDO ,  Yoshihiko ITO

IPC分类号： B22D19/00

CPC分类号： B22D19/0027 ,  B23P15/10 ,  F02F3/0084 ,  F02F3/14 ,  F02F3/26 ,  F05C2201/0412 ,  F05C2201/0436 ,  F05C2201/0487 ,  F05C2201/903 ,  F05C2203/0808 ,  F05C2203/0869 ,  Y10T29/49249

摘要： A piston for in-cylinder fuel-injection type internal combustion engine includes a piston body, a low thermal conductor, and a piston head. The low thermal conductor is disposed on the top of the piston body. The low thermal conductor includes a low thermally-conductive substrate, and a coating layer. The low thermally-conductive substrate has opposite surfaces. The coating layer includes alumina fine particles (Al2O3). The coating layer is adhered on at least a part one of the opposite surfaces of the low thermally-conductive substrate that makes a cast-buried or enveloped surface to be cast buried or enveloped in the piston head.